Square Root Calculator › Square root of 811
Square Root of 811
√811 ≈ 28.478062
811 is not a perfect square, so √811 is an irrational number that is approximately 28.478062. In simplified radical form, √811 = √811.
√811 lies between √784 = 28 and √841 = 29.
| Number | 811 |
| Square root (decimal) | 28.478062 |
| Simplified radical | √811 |
| Perfect square? | No |
| Rational? | No |
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Frequently asked questions
Is 811 a perfect square?
No, 811 is not a perfect square, so its square root is irrational and approximately 28.478062.
What is the square root of 811 in simplest radical form?
√811 = √811 in simplest radical form.